add PHP 5.6 to .travis.yml

sasezaki · sasezaki · commit eaf38c37c0c1 · 2014-08-29T20:36:46.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -9,6 +9,7 @@ php:
   - 5.3.3
   - 5.4
   - 5.5
+  - 5.6
 
 before_install:
  - composer self-update
